There's not enough information here to answer this accurately. One problem is the lack of operation indication. This could be 3x or 3x or 3 - x or 3 + x. In the future, it is better to write out operations on this website. Presumably, you were given a set of expressions to compare that to but you didn't include them. One possibility:
x + x + x = 3x
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lcm(11,18) Factor the expressions that are not already factored. 18=2 x 3² Identify all the factors and their highest power in all expressions. Multiply the highest powers of these factors to get the least common multiple. 2 x 3² x 11 Expand the expression. 198
This won't get answered successfully. There are no operational signs in the question and there are no following expressions to compare it to.
x - 3
(3 x 12) + (4 x 12) = 7 x 12 = 84
2 x 2 x 2 x 3 x 5